linux-kernel - [PATCH 0/4] regulator: spacemit-p1: Fix voltage ranges and support board power tree

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Message-Id: <20260122-spacemit-p1-v1-0-309be27fbff9@riscstar.com>
Date: Thu, 22 Jan 2026 17:43:41 +0800
From: Guodong Xu <guodong@...cstar.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Yixun Lan <dlan@...too.org>, Alex Elder <elder@...cstar.com>, 
 Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Troy Mitchell <troy.mitchell@...ux.spacemit.com>, 
 Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>
Cc: linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, devicetree@...r.kernel.org, 
 Guodong Xu <guodong@...cstar.com>
Subject: [PATCH 0/4] regulator: spacemit-p1: Fix voltage ranges and support
 board power tree

This series fixes hardware voltage constraints and enables flexible power
tree configurations for the SpacemiT P1 PMIC.

Patch 1, n_voltages is corrected to match hardware register widths, as the
previous values prevented regulators from reaching higher operational
voltages (e.g., 3.3V on LDOs).

Patch 2-4, hardcoded supply assumptions are replaced with explicit
devicetree properties. PMIC supply connections are board-design decisions.
Moving this to DT allows supporting varied topologies without driver
modifications.

Note: Patch 3 introduces a bisect breakage by transitioning to
pin-specific supply names. Probe failures will occur on existing board
(K1 Bananapi F3) until Patch 4 updates the corresponding DTS file.

Signed-off-by: Guodong Xu <guodong@...cstar.com>
---
Guodong Xu (4):
      regulator: spacemit-p1: Fix n_voltages for BUCK and LDO regulators
      dt-bindings: mfd: spacemit,p1: Add individual regulator supply properties
      regulator: spacemit-p1: Update supply names
      riscv: dts: spacemit: k1-bananapi-f3: Update PMIC supply properties

 .../devicetree/bindings/mfd/spacemit,p1.yaml       | 58 +++++++++++++++++++++-
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts    | 12 ++++-
 drivers/regulator/spacemit-p1.c                    | 25 ++++++----
 3 files changed, 80 insertions(+), 15 deletions(-)
---
base-commit: c8a4a774a9b0d2c86593492625874e27e9cbc9a9
change-id: 20260122-spacemit-p1-ae596efe885f

Best regards,
-- 
Guodong Xu <guodong@...cstar.com>